If a tree falls in the forest… the National Park Service may have recorded it, along with howling wolves, thunder crackling, and other natural sounds. That includes man-made noise like chainsaws and cannon fire at Ft. McHenry!

Remember how bluebirds helped Snow White tidy up an abandoned cottage in the Disney classic? Meet Spider Drone, a quadcopter that weaves structures out of steel cables and can operate at heights unreachable by ordinary building equipment.